Printer ink cartridge



FIG. 1 is a front elevation of a printer ink cartridge according to the present invention;

FIG. 2 is a rear elevation thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevation thereof; and,

FIG. 5 is a top, front and right side perspective view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a printer ink cartridge, as shown and described. 